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UNITED STATES PATENT Frrcn.

THOMAS M.-BRINTNALL, OF MEDINA, OHIO.

V l S E.

SPECIFICATION forming part of Letters Patent No. 514,614, dated February 13, 1894.

Application filed March 30, 1893- Serial No. 468,400. (No model.)

Ohio, have invented certain new and useful Improvements in Vises; and I do hereby do clare that the following is a full, clear, and exact description of the inventiomwhich will enable others skilled in'the art to which it IO appertains to make and use the same.

My invention relates to improyements in v ses, commonly known as bench or table vises, and the invention consists in the construction substantially as shown and described and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is partly a side elevation and partly a central sectional elevation of my improved vise, with so the jaws separated, and Fig. 2 is a side elevation thereof with the jaws clamping an article between them. Fig. 3 is a front elevation of the inner removable jaw alone, and Fig. 4 is a central vertical sectional view of the lower part of the said jaw, revealing especially the form of the groove or channel therein. Fig. 5 is a cross section of the toothed supporting arm or extension of the body.

A represents the body of the vise, and B 3 and C, respectively, the jaws thereof. The

body A is formed with a jaw supporting bar or projection a, having a series of transverse teeth a, and shoulders or ribs 0. lengthwise along the top thereof at the base of the teeth,

and strengthening flanges a at either side of the bottom of the bar. Obviously, this is only one of many forms of baror beam athat might be adopted and serve the same purpose and be within the spirit of the invention. Upon 4 this bar, constructed throughout its length as seen in Fig. 5, I place the sliding jaw B. This jaw may be moved by hand to any desired position on the bar 0., according to the size of the article to be held, and can be bodily removed therefrom and replaced with ease.

Said jaw is provided with a head suited to the formation of said bar, and has flaring side grooves or channels 5 adapted to the shoulders a thereof, a tooth or teeth I) to engage 5c the teeth a, and an open slot along its bottom of the jaw is to be changed it can beraised at its rear to clear the engaging tooth or teeth substantially as seen in Fig. 1. \Vhcn in this latter position the jaw is free to be moved back and forth. It will also be noticed that the channels or grooves 11 at their front are of such size that they afford simply afree sliding movement to the jaw on the shoulders a and do not .permit any material up and down movement of the jaw at this point. This prevents the jaw from lifting or tilting up at the front when pressure is on, and causes the pressure to so firmly lock tooth b on the bar a, that the jaw cannot slip or yield. Obviously the teeth or catches on the jaw and bar may be diherentl y consi ructed from what are here shown and serve the same purpose. Any equivalent of the construction shown may be adopted. The jaw O is pivoted at c to the body A, and at about its center has an opening 0 for the passage of the binding screw E. The opening or hole 0 is somewhat enlarged as compared with the screw E so as to give the jaw G the requisite freedom of back and forth movement at its top, say half an inch or thereabout. It will be observed that when a piece is fastened between the two jaws and the binding screw is applied, the engaging teeth of the rear jaw firmly unite with the rack teeth of the bar by compression force. Also that but a part of a turn,-or one or two turns at most of the binding screw is necessary to clamp the object in place, and that the strength of the vise is not weakened by the position of the sliding jaw, and that I may and do employ a finer threaded screw for binding than is commonly used in bench vises.

To operate, the front jaw is supposed to stand a little out from the head of the bar. Tilt the rear jaw slightly forward till it is disengaged and shove it back; place the object a front jaw pivoted at its lower end to said.

frame, and an operating screw for adjusting the front jaw, substantially as described.

2. Ina vise, the combination of a suitable supporting frame or bar, a self-locking rear jaw which is adapted to be slid longitudinally on the said frame, a front jaw pivoted at its lower end to said frame, and an operating screw for adjusting the upper end of the front jaw, substantially as described.

3. In a vise, the combination of a-supporting frame .or bar provided on its upper surface with spaced locking means, a self-locking rear jaw which is adapted to be slid longitudinally on said frame, and when released todrop automatically into and be held by-the locking means, a front jaw pivoted at its lower end to said frame and an operating screw foradjusting the upper end of the front jaw backward and forward, substantially as described.

4. In a vise, the combination of a supporting bar or frame provided on its upper surface with rlocking teeth or ratchets, a selflocking rear jaw provided with a tooth or pawl to engage the teeth on the frame, said jaw adapted to be slid longitudinally on the frame and when released to automatically drop into and "be held by the teeth on said frame, a front jaw pivoted at its lower end to said frame and a screw which passes through the said front jaw for adj usting the upper end of the same, substantially as described.

5. Ina vise, the combination of a supporting bar or frame provided with locking means forholdi-ngthe rear jaw of the vise and having longitudinal flanges or shoulders, a rear jaw having grooves which engage the flanges of the frame and adapted to be slid "longitudinally on said frame, a front jaw pivoted at its lower end to the frame and an adjust-v ing screw which passes through the front jaw and enters the head of the framefor adjusting the upper end of said jaw, substantially as described.

Witnessmy hand .to the foregoing specification thisr27th day of February, 1893.

THOMAS M. BR I'NTN ALL.

Witnesses:

EDWARD M. FISHER, H. T. FISHER. 

